This controversial diet is centred around low carbohydrate intake (< 20g/d) and getting most calories (70%) from fat and the remainder from protein. The diet is gaining popularity in the media and with many physicians for its effects on insulin, IGF-1, and the immune system. I've been on this diet for a few months now and fasting for 72 hours around the time of chemotherapy doses (which was nasty on weekly chemo!). Has anyone else out there been looking at this diet or fasting/fasting mimicking diet as a way of helping the immune system boost its activity against cancer cells? Certainly more studies are needed, but the logic makes sense to me: starving cancer cells of sugar puts them into a different metabolic pattern, where they may be more susceptible to chemo and the immune system.